import 'package:flutter/material.dart';

class LunboTu extends StatefulWidget {
  const LunboTu({Key? key}) : super(key: key);

  @override
  _LunboTuState createState() => _LunboTuState();
}

class _LunboTuState extends State<LunboTu> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: TuApp(),
    );
  }
}

class TuApp extends StatefulWidget {
  const TuApp({Key? key}) : super(key: key);

  @override
  _TuAppState createState() => _TuAppState();
}

class _TuAppState extends State<TuApp> {
  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        Container(

          child: AspectRatio(
            aspectRatio: 16/9,
            child: Text(''),
          ),

        )

      ],
    );
  }
}

